RFR: 8377554: Load card table base and other values via AOTRuntimeConstants in AOT code [v4]

[Vladimir Kozlov]

On Tue, 24 Feb 2026 09:57:33 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> AOTRuntimeConstants::card_table_address() returns the address of the field in the static AOTRuntimeConstants object where the card table address (byte_map_base) is stored. So,
>> 
>>     __ movptr(rscratch, ExternalAddress(AOTRuntimeConstants::card_table_address()));
>> 
>> simply loads the  address of that field into `rscratch`. We need to load via that address to obtain the actual card table address.
>
> This also needs fixing in premain.

No, `movptr` loads from this address. It is not `lea` instruction.
And `movq` simply moves value from register to register - it does not do anything in this case.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29884#discussion_r2848302213